#include <iostream>
#include <vector>

using namespace std;

static vector<int> transformer() {
    const string s {
        "73167176531330624919225119674426574742355349194934"
        "96983520312774506326239578318016984801869478851843"
        "85861560789112949495459501737958331952853208805511"
        "12540698747158523863050715693290963295227443043557"
        "66896648950445244523161731856403098711121722383113"
        "62229893423380308135336276614282806444486645238749"
        "30358907296290491560440772390713810515859307960866"
        "70172427121883998797908792274921901699720888093776"
        "65727333001053367881220235421809751254540594752243"
        "52584907711670556013604839586446706324415722155397"
        "53697817977846174064955149290862569321978468622482"
        "83972241375657056057490261407972968652414535100474"
        "82166370484403199890008895243450658541227588666881"
        "16427171479924442928230863465674813919123162824586"
        "17866458359124566529476545682848912883142607690042"
        "24219022671055626321111109370544217506941658960408"
        "07198403850962455444362981230987879927244284909188"
        "84580156166097919133875499200524063689912560717606"
        "05886116467109405077541002256983155200055935729725"
        "71636269561882670428252483600823257530420752963450"
    };
    vector<int> v;
    for (char c : s)
        v.push_back(c - '0');
    return v;
}

int main() {
    int64_t product = 0;
    vector<int> v = transformer();
    for (auto i = 12; i < v.size(); ++i) {
        int64_t tmp = 1;
        for (auto j = 0; j < 13; ++j) 
            tmp *= v[i - j];
        if (tmp > product) {
            product = tmp;
            cout << product << endl;
        }
    } // 23514624000
}